Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25c93673ac19cc1…

MALICIOUS

PDF

71.9 KB Created: 2021-09-10 02:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: eea484ca28f827e81acb380da181865d SHA-1: c0ec8f438d7779f52f4a4f115bfcae98214f31b8 SHA-256: f25c93673ac19cc1aac4c21e4334d7cd0b70b9875b6d387a668d59e6bb937e7d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised WordPress sites, indicating a potential phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7062

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=five+example+of+system+software PDF link annotation
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95598564128.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613921f323eb6---gelisetefebuwuraxud.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/11656084438.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/1147358251.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/vadenipini.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/13622478180.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/kugajaxinu.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/87898003168.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a795d4008d---41695497247.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/tutudawilego.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/a28def6687faf72c70ddec036dc3cd75/xobabalikokosatan.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/79002405743.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/87653280533.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613235560c13a---vizixorabupizujaluwol.pdfIn PDF document text
    • http://bolt-go77.com/fckeditor/userfiles/file/66935947783.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/57027668928.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/bogofanebibil.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/41988904168.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/napudosutogumu.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1630780615.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/neritagopob.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/tozosix.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4A 16712 bytes
SHA-256: 86fca5efd22c91660d48b5da93b086f8ccb9d7d008756d040ab26a3d223e1906
font_01_sfnt_off0000f667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF667 10760 bytes
SHA-256: e38d04ab4fecd67b7e9ce91300811cca6d28691042bcb05bacf6879201380cde

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